# 6x12 Cargo Trailer Rental in Upland > Rent the largest enclosed U-Haul trailer, the 6x12, in Upland. Check your tow rating, pack it to tow straight, and get a free hookup check at pickup. Source: https://route66autorepairshop.com/u-haul-rentals/cargo-trailers/6x12-cargo-trailer-rental Updated: 2026-09-17 Business: Route 66 Auto Repair, 1775 W Foothill Blvd, Upland, CA 91786, (909) 608-7699 Hours: Monday to Friday 8 AM–5 PM, Saturday 8 AM–2 PM, Sunday closed **TLDR:** The **6x12 cargo trailer** is our biggest enclosed size. It asks the most of your **tow vehicle**, so check the rating first and **confirm current capacity on uhaul.com**. The 6x12 is the largest enclosed U-Haul trailer you can pick up at Route 66 Auto Repair in Upland. It suits a 1 to 2 bedroom load behind a pickup or full-size SUV that is rated for it. You book it on uhaul.com, and our technicians check your hitch, ball, chains and lights for free before the trailer leaves our lot in Upland. Heavy trailers reward preparation, so start with your vehicle. ## Is your vehicle up to a 6x12? A bigger trailer means more weight behind you and more work for every system on your truck or SUV. Look for these before you reserve. - A towing rating in the owner's manual that covers a loaded trailer of this size - A receiver hitch whose class and label meet U-Haul requirements - Working light wiring at the rear plug - Tires with even wear, set to the pressure on the door placard - A cooling system that holds steady on the 210 in summer ## 6x12 trailer or a moving truck? The 6x12 wins when your truck or SUV is rated for it and you want to arrive with your own vehicle and everything else in one trip. It loses when the tow vehicle is borderline, when the route climbs the Cajon Pass in August, or when nobody in the family has pulled a long trailer before. A mid-size or large truck carries a similar household without the hitch question. Compare sizes on the [moving trucks and vans](https://route66autorepairshop.com/u-haul-rentals/moving-trucks-and-vans) page before you decide. Smaller households may fit the [5x8 cargo trailer](https://route66autorepairshop.com/u-haul-rentals/cargo-trailers/5x8-cargo-trailer-rental) instead. ## How do you pack a long box so it tows straight? Think in thirds. The front third takes the heaviest furniture and appliances. The middle takes dense boxes and the mattress set standing on edge. The back third takes light, bulky things like chairs and bedding. Leave room for a strap every few feet and cinch each tier to the rails. A long load that slides backward on the first hard stop changes the tongue weight in a second. ## Our 6x12 trailer pickup process 1. **Confirm the pairing:** We check that the reservation lists your tow vehicle and that the paperwork matches the trailer. 2. **Walk the trailer:** Doors, latches, tires and existing marks are noted and photographed. 3. **Hook up:** Ball and coupler are matched, the latch closed, the pin installed and the chains crossed under the tongue. 4. **Test lights:** Brake, turn and running lights are checked with a second set of eyes. 5. **Review the stance:** We look at tongue weight and the hitch rating, then you take a slow lap of the lot before you pull out. ## What's included with a 6x12 cargo trailer - Reservation and license check - Door and latch walk-around - Cargo-area cleanliness photo - Free hookup check at the coupler and chains - Trailer light test - Hitch rating comparison with U-Haul requirements ## Tow vehicle: need-now or need-later? **Need now:** - Rear lights or wiring that fail at the plug - Coolant temperature that climbs on grades - Brake pulsation or grinding under load **Need later:** - An aging battery that still tests fine - Wiper blades that streak in the dry season - A scheduled fluid service that is close but not past due ## How pricing and timing work U-Haul sets the 6x12 rental rate and shows it on the [U-Haul dealer page](https://www.uhaul.com/Locations/Truck-Rentals-near-Upland-CA-91786/001061/) when you book. Weekends and month-end fill first, so reserve early, and plan a little extra time at pickup for a larger trailer. If you want a [transmission condition inspection](https://route66autorepairshop.com/diagnostics-and-inspections/transmission-condition-inspection) or another paid check before a long tow, the fee is stated at the counter first, and any repair gets a written estimate. ## Before and after the long drive Stop after the first few miles and walk around: latch, pin, chains, plug. Repeat at every fuel stop. On a one-way move, the drop-off location is set in your reservation, and the [one-way rentals](https://route66autorepairshop.com/u-haul-rentals/one-way-rentals) page covers the details. If the tow vehicle ran hot or smelled of burning fluid on the way, have it checked before your next trip. ## Frequently asked questions ### What kind of vehicle can pull a 6x12 cargo trailer? Usually a pickup or larger SUV with a matching hitch and a towing rating that covers the loaded trailer. Enter your vehicle on uhaul.com when you reserve so the pairing is checked, and we compare the hitch rating at pickup. ### Will a two-bedroom apartment fit in a 6x12? Some do, especially with compact furniture and well-packed boxes. Large sectionals and full dining sets change the math. Confirm current capacity on uhaul.com, and consider a truck if your list keeps growing. ### Is a 6x12 cargo trailer hard to back up? A longer trailer responds more slowly than a short one, which many drivers find easier to control. Practice in an empty lot, use a spotter, and plan your parking so you can pull forward whenever possible. --- Call (909) 608-7699 or visit https://route66autorepairshop.com/contact for a written estimate.